bluez-tools: unstable-2016-12-12 -> unstable-2020-10-24

Has a few fixes. Among other things fixes upstream gcc-10 build failure:

    ld: bt-agent.o:(.bss+0x0): multiple definition of `agent_need_unregister';
      lib/agent-helper.o:(.bss+0x0): first defined here

pkgs/tools/bluetooth/bluez-tools/default.nix

@@ -2,14 +2,14 @@
 , fetchFromGitHub, glib, pkg-config }:
 
 stdenv.mkDerivation rec {
-  version = "unstable-2016-12-12";
+  version = "unstable-2020-10-24";
   pname = "bluez-tools";
 
   src = fetchFromGitHub {
     owner = "khvzak";
     repo = "bluez-tools";
-    rev = "97efd293491ad7ec96a655665339908f2478b3d1";
-    sha256 = "08xp77sf5wnq5086halmyk3vla4bfls06q1zrqdcq36hw6d409i6";
+    rev = "f65321736475429316f07ee94ec0deac8e46ec4a";
+    sha256 = "0xk39lz3hm8lcnb5fdbfz4ldbbq8gswg95vilzdwxzrglcr6xnqq";
   };
 
   nativeBuildInputs = [ pkg-config autoreconfHook ];